The 3.0-liter Audi CGWA 3.0 TFSI engine was assembled at the concern’s factories from 2009 to 2013 and was installed on the fourth-generation all-wheel drive modification of the A8 model before restyling. This power unit was essentially a slightly updated version of the engine under the CAJA index.
The EA837 series includes: BDW, AUK, BDX, CAJA, CGWA, CGWB, CREC.
Specifications
Production years | 2009-2013 |
Displacement, cc | 2995 |
Fuel system | direct injection |
Power output, hp | 290 |
Torque output, Nm | 420 |
Cylinder block | aluminum V6 |
Block head | aluminum 24v |
Cylinder bore, mm | 84.5 |
Piston stroke, mm | 89 |
Compression ratio | 10.5 |
Features | DOHC |
Hydraulic lifters | yes |
Timing drive | 4 chains |
Phase regulator | on the intake shafts |
Turbocharging | compressor |
Recommended engine oil | 5W-30 |
Engine oil capacity, liter | 6.5 |
Fuel type | petrol |
Euro standards | EURO 5 |
Fuel consumption, L/100 km (for Audi A8 2011) — city — highway — combined |
12.9 6.9 9.1 |
Engine lifespan, km | ~240 000 |
The engine was installed on:
- Audi A8 D4 (4H) in 2010 – 2013.
Disadvantages of the Audi CGWA engine
- Most often, owners of A8 with such an engine complain about increased oil consumption.
- The reason is usually scuffing from catalyst crumbs that are drawn into the cylinders.
- Since there are no check valves for the cylinder head oil channels, the chains crack during a cold start.
- Another culprit for the noise of the timing chains here can be the wear of the hydraulic tensioner.
- The pump, high-pressure fuel pump have a low resource, and muffler corrugations often burn out.